bugfix: .env.example files updated. some minor changes in jwt strategy to avoid failing when .env files does not contain needed keys.

infrastructure/.env.example

@@ -12,9 +12,13 @@ DOMAIN=dyolink.com
 
 # Backend Environment (create backend.env from this)
 # NODE_ENV=production
-# JWT_SECRET=CHANGE_THIS_TO_STRONG_SECRET_32_CHARS
+# PORT=3000
 # DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}
-# CORS_ORIGIN=https://dyolink.com
+# JWT_SECRET=CHANGE_THIS_TO_STRONG_SECRET_32_CHARS
+# JWT_EXPIRES_IN=15m
+# JWT_REFRESH_SECRET=another_long_random_secret_different_from_JWT_SECRET
+# JWT_REFRESH_EXPIRES_IN=30d
+# FRONTEND_URL=https://dyolink.com
 
 # Frontend Environment (create frontend.env from this)
 # NEXT_PUBLIC_API_URL=/api